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General product information

History

The signal bells, as this bell is also called, came up with the invention of the railway: a clearly distinguishable acoustic signal that should warn about dangers and attract attention. For more than a century it was the common bell used in houses and flats.

The signal bell - an electromechanical functional principle

The sound of this bell is produced by a clapper, that beats against a cone in rapid succession. The clapper is set in motion by a contact breaker circuit in the manner of a trembler: An anchor attached to a steel spring is pulled by an electromagnet (by this the clapper hits against the cone) until - at maximum pull - the circuit is interrupted and the clapper springs back. Thus the circuit is closed and the anchor gets pulled again by the electromagnet - the process starts all over again and the bell rings. The advantage over todays common 2-tone-gong is that the bell rings as long as the bell button is pushed.

Specific product information

Mounting instructions

Do not connect the bell to a power supply line but to a bell-wire with an upstream transformer (output voltage 8-12 V~). Battery operation is not possible. The bell can be installed directly behind the front door or anywhere else in the house.

Packaging, delivery, lead time

Lead time

We usually have small quantities in stock. For larger orders we anticipate a lead time of 8 weeks.

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